Automatic cut-off for gas-burners.



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AUTOMATIC GUT-OFF'POR GAS BURNERS.

APPLICATION FILED JUNE 22| 1903- 2 SHEETS-SHEET L N0 MODEL.

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PATENTED SEPT. 1, 1903...

J. HBNTZ, JB.. AUTOMATIC GUT-OPF PoR GAS BURNBRS.

APPLIOATION FILED JUNE 22. 1903.

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UNITED STATES Patented September '.l,v 1903.

PATENT OFFICE.

JACOB HENTZ, JR., OF PHILADELPHIA, PENNSYLVANIA.

SPECIFICATION forming part of Letters Patent No. 738,037, dated September 1, 1903.` Application iiled June 22, 1903. Serial No. 162,653. (No model.)

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Be it known that I, JACOB HENTZ, Jr., a citizen of the United States, residing at Philadelphia, in the county of Philadelphia and State of Pennsylvania, have invented certain new and useful Improvements in Automatic Gut- Offs for Gas-Burners; and I do declare the following to be a full, clear, and exact description of the invention,such as will enable others skilled in the art to which it appertains to make and use the same.

This invention relates to improvementsin automatic cut-offs for gas-burners.

The object of the invention is to provide an attachment for gas-burners whereby should the light be accidentally put out from any cause without turning off the gas the attachment will be actuated to cut ed the supply of gas, and thereby prevent the escape of the same.

Another object is to provide a gas cut-oit which will automatically set itself after the gas has been turned on and lighted.

A further object is to provide a device of this character which will be simple in construction, reliable, eflicient, and well adapted to the use for which it is designed.

lVith these and other objects in view the invention consists of certain novel features of construction, combination, and arrangement of parts, as will be more fully described, and particularly pointed out in the appended claims.

In the drawings, Figure 1 is a side elevation of the device, showing the same applied to the burners of a gas-radiator, showing in full and brol-:en lines the two positions of the parts. Fig. 2 is a top plan view of the same. Fig. 3 is a detail view of the operating-arm detached. Fig. 4 is a similar view of the trigger. Fig. 5 is a similar view of the trip-arm.

Referring more particularly to the drawings, 1 denotes the burner-pipe of a gas stove or radiator. 2 denotes brackets iixed at their lower ends to a suitable base 3 and adapted to support said burner-pipe in a horizontal position above the base.

4 and 5 denote vertical standards fixed at their lower ends to the brackets 2. In the upper ends of the standards 4 and 5 are formed alined apertures, and the upper end of the standard 5 is bent over at right angles to the length of the same, as shown.

6 denotes braces fixed at their upper ends to the standards 4 and 5 and at their lower ends to the burner-pipe l.

7 denotes burners arranged on the burnerpipe between the standards 4 and 5. There may be any desired number of burners, two being shown in the drawings.

8 denotes a thermostatic bar arranged above the burners 7 and supported in the apertures formed in the upper ends of the standards 4 and 5. The end of the bar 8, which passes through aperture in the standard 4, is threaded, and upon said threaded end are secured nuts 9 and 10, one on each side of the standard 4, whereby the bar 8 is adjustably held in position.

12 denotes a swinging arm pivoted at its upper end to the angularly-bent end of the standard 5, the lower end of the arm 12 being bent laterally and forwardly, as shown, to the arm 12. Near the upper end is pivotally connected the free end of the thermostatic bar 8, as shown.

13 denotes a valved coupling connected at one end to the end of the burner-pipe and formedv on its opposite end with a corrugated nipple 13, to which may be connected the usual rubber gas-pipe, (not shown,) or this end of the coupling may be threaded, if desired, for connection with a metal gas-pipe.

In the coupling 13 is arranged the usual plugvalve 14, having alimit-pin 15, which is adapted to engage a stop-shoulder 16 to limit the movement of the valve and operating-lever when the gas is turned all the way on or 0E.

17 denotes an operating-lever having a fixed connection with the stem of the valve 14. On the end of the longer arm of the lever 17 is arranged an adjustable weight 18, and to the oppositely-projecting short arm 19 of the lever is pivotally connected a trigger or catch 20. The trigger 20 consists of an upper arm 21, slotted longitudinally and provided with a shoulder which forms a tooth 22, and av lower arm 23, which is slotted laterally, and in one wall of the slot are formed notches 24 and 25, which are adapted to engage a pin 26, which projects laterally from the side of the IOO coupling 13. To the lower end of the lower arm 23 is connected a weight 27.

28 denotes a trip-arm pivoted at its inner end to the lower forwardly-bent end of the swingingfarm 12. In thelower edge of the triparm is formed a notch 29. On the inner pivoted end of the trip-arm is formed a projecting curved finger 30, which when the trip-arm is raised will engage the end of the arm 12 and limit the upward movementof the same, as will be understood. The trip arm is adapted to have a sliding engagement with -the upper arm 21 of the trigger 2O through the slot in the same.

The operation of the device is as follows: l Assuming the parts to be in the position when the gas is turned on, as shown in full lines in Fig. 1, in which position the lever 17 is raised and the lower slotted arm 23 ot' the trigger pushed down until the notch 24 in the same engages the pin 26, which projects from the side of the valve-casing 13, the arm being thus held connected tothe pin by the weight27. As soon as the gas is lighted the thermostatic bar 8 will be heated and caused to expand, and thereby increasing its length, which will swing the arm 12 outwardly, thereby pushing the trip-arm 28 through the slot in the upper trigger-arm 21 until the notch 29 in the triparm drops into engagement with the tooth 22 on the trigger. With the parts in this position if from any cause the gas should be unintentionally put out the thermostatic bar S would immediately cool and retract, thereby swinging the arm 12 inwardly and drawing on the trip-arm 28, which will rock the trigger-arm and release the notch 24 in the same from engagement with the pin 26, allowing the weight 18 to pull the operating-lever 17 down to the dotted position shown in Fig. 1, which turns oft the gas. When the parts are brought to this position, the notch 25 in the lower arm of the trigger engages the pin 26 and locks the lever 17 against upward movement until the trigger-arm is rocked to release the notch 25 from the pin 26. Vhen the lever 17 is down, the upper arm of the trigger is swung upwardly and raises the triparm 2S, as shown; but the upward movement of the trip-arm is limited by the stop-fin ger 30, and the same is prevented from being entirely withdrawn from the slot in the arm 21.

By adjusting the nuts 9 and 10 on the end of the thermostatic bar the same may be lengthened or shortened, which will increase or diminish the time of operation of the parts.

In the arrangement of the parts as herein described it will be seen that the operation I i I of the same is entirely automatic and that the parts are not liable to get out of order and can be relied upon to operate in event of the gas being blown or otherwise inadvertently put out.

From the foregoing description, taken in connection with the accompanying drawings, the construction and operation of the invention will be readily understood without requiring a more extended explanation.

Various changes in the form, proportion, and the minor details of construction may be resorted to without departing from the prin- 1 ciple or sacrificing any of the advantages of this invention.

Having thus fully described my invention, what I claim, and desire to secure by Letters Patent, is

1. In a device of the character described, the combination with a burner-pipe and gasburner, of a thermostatic bar arranged above the same, a coupling provided with a controlling-valve and connected to said burnerpipe, an operating-lever connected to said valve, means 'for actuating the operatinglever, a trigger-arm carried by said lever to lock the same in its upper and lower position, and means actuated by said thermostatic bar whereby said trigger is released to allow said operating-lever to turn off said valve, substantially as described.

2. In a device of the character described, the combination with a burnerpipe and burner of an adjustable t-hermostatic bar arranged above the same, a coupling provided with a controlling-valve and connected to said burner-pipe and having formed thereon a stop-pin, a weighted operating-lever connected to said valve, a trigger pivotally connected to the inner end of said lever to automatically engage the stop-pin on said valvecoupling to hold said lever in its upper and lower position, and means actuated by said thermostatic bar to trip said trigger and release said operating-lever when in its raised position to permit the same to lower and turn oft said valve, substantially as described.

3. In a device of the character described, the combination with a burner -pipe and burner of an adjustable thermostatic bar arranged above the same, a coupling provided with a controlling-valve and connected to said burner-pipe and having formed thereon a stop-pin, a weighted operating-lever connected to said valve, a trigger pivotally connected to the inner end of said lever and having upper and lower slot-ted arms, notches formed in the slot of said lower arm to automatically engage the stop-pin on said coupling to hold said lever in its upper and lower position, a tooth formed on said upper arm, a swinging arm pivotally connected to said thermostatic bar, and a trip-arm pivotally connected to said swinging arm and having a notch to automatically engage the tooth on the upper arm of said trigger, upon the eX- pansion of said thermostatic bar whereby upon-the retraction of said bar said trip-arm will rock said trigger and release the operating-lever to permit the same to lower and turn oli said valve, substantially as described.

In testimony whereof I have hereunto set my hand in presence of two subscribing witnesses.

JACOB HENTZ, J R.

Witnesses:

FRANCIS J. DOYLE, MARY C. DOYLE.

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